CN101706395B - Device for measuring hydrogen brittleness sensitivity of material in low-temperature environment - Google Patents
Device for measuring hydrogen brittleness sensitivity of material in low-temperature environment Download PDFInfo
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- CN101706395B CN101706395B CN2009102342712A CN200910234271A CN101706395B CN 101706395 B CN101706395 B CN 101706395B CN 2009102342712 A CN2009102342712 A CN 2009102342712A CN 200910234271 A CN200910234271 A CN 200910234271A CN 101706395 B CN101706395 B CN 101706395B
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 63
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 63
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 239000000463 material Substances 0.000 title claims abstract description 21
- 230000035945 sensitivity Effects 0.000 title abstract description 5
- 238000002474 experimental method Methods 0.000 claims abstract description 32
- 230000001105 regulatory effect Effects 0.000 claims abstract description 14
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000008393 encapsulating agent Substances 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 claims description 5
- 229910000570 Cupronickel Inorganic materials 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 229910000829 Nisil Inorganic materials 0.000 claims description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 claims description 2
- DBUTVDSHVUGWOZ-UHFFFAOYSA-N [Si].[Ni].[Cr].[Ni] Chemical compound [Si].[Ni].[Cr].[Ni] DBUTVDSHVUGWOZ-UHFFFAOYSA-N 0.000 claims description 2
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 2
- 238000003754 machining Methods 0.000 claims description 2
- 229910000768 nicrosil Inorganic materials 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 24
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 206010008469 Chest discomfort Diseases 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002803 fossil fuel Substances 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
A hydrogen brittleness sensitivity measuring device for a material under a low-temperature environment is composed of a test bed base 2, a test box 8, a stress application shaft 9, a sample clamping part, a hydrogen charging connecting part and a temperature measuring and adjusting device 18; the sample clamping component consists of a loading clamp A5, a loading clamp B6 and a fixing clamp 4; the sample clamping component is arranged in the experiment box 8; the stress application shaft 9 penetrates through the center of the experimental box 8 from the upper part, the lower part of the stress application shaft 9 is coaxially connected with the upper part of the sample 12 through a sample clamping part, the hydrogen charging connecting part penetrates through the center of the experimental box 8 from the lower part, and the upper part of the hydrogen charging connecting part is coaxially connected with the lower part of the sample 12 through threads; the temperature measuring and regulating device 18 is arranged in the experimental box 8. The device is used for measuring the change of the mechanical property of the material under the high-pressure hydrogen charging environment, but does not use a high-pressure cavity, and only one low-temperature environment is provided in the cavity, so that the experimental process is extremely safe, and the problem of potential safety hazard caused by the high-pressure cavity used in the previous hydrogen charging experiment is solved.
Description
Technical field
The present invention relates to a kind of device, relate in particular to the measurement mechanism of the mechanical property of material under a kind of low temperature hydrogen environment.
Background technology
Along with expanding economy, the global energy demand is increasing.Related data shows, during the 2003-2030, annual increase by 2.0% is estimated in international energy consumption, particularly the energy demand of Asia (comprising the nations of China and India), central and south america, Africa, the Middle East, Eurasia growth will be the fastest, the energy demand average annual growth rate 5.0% that these are national.The world today, most of energy demands are satisfied by fossil fuel.On the one hand, because fossil fuel is limited, will make the whole world be faced with energy crisis; On the other hand, owing to a series of environmental problems that combustion of fossil fuel brings, the mankind's life, vegeto-animal existence have been brought and had a strong impact on as greenhouse effect, depletion of the ozone layer, acid rain etc.Therefore, seek a kind of easy, economic, clean energy and will become the key that addresses these problems.
Hydrogen Energy economy has obtained continuous development at present.Hydrogen is the abundantest the lightest element in the Nature, can burn and discharges big energy with oxygen, and its energy/mass ratio is big, and water is arranged in the fuel Products, therefore is a kind of clear energy sources of tool potentiality.Hydrogen generally stores with compressed hydrogen or liquid hydrogen.Yet the storage of hydrogen and transportation become the bottleneck of Hydrogen Energy widespread use.
At present, the rise of oil price makes us face energy crisis, CO
2Discharging, the increase of greenhouse effect makes us face the pollution problem of environment again.Therefore, the energy of novel clean will become the focus that we pay close attention to.Hydrogen Energy is used to come more extensively as a kind of important cleaning, green energy resource, this will for growing population to the demand of the energy provide may, and realized that zero pollutes.Not only safe but also economic accumulating hydrogen technology becomes the key issue of this novel energy widespread usage.Now, the most general direct mode is high pressure or low temperature storage hydrogen, and the used pressure vessel of storage hydrogen, storage tanks etc., its material have certain hydrogen embrittlement susceptibility under high pressure low temperature, the diffusion of hydrogen atom in metal material, cause the plasticity reduction degree of material and embrittlement, this has influenced the serviceable life of storage tank greatly, and hydrogen is again the inflammable gas that stores under high pressure, exists great potential safety hazard.Therefore the Mechanical Properties of material under high pressure or low temperature hydrogen environment seemed particularly important.At present, more to the hydrogen embrittlement Study of Sensitivity of material under high temperature or the normal temperature high voltage, and the research under the cryogenic high pressure is also rarely had report.
Usually, hydrogen embrittlement susceptibility is like this prediction: the cylinder high pressure storage tank, fill hydrogen, in sample is arranged, from external load.Yet this method is expensive and have a safety problem.
Summary of the invention
Technical matters to be solved by this invention is to fill in the test unit that material mechanical performance under the hydrogen environment measures the safety problem that the existence owing to high pressure chest relates at existing high pressure, the measurement mechanism of the mechanical property of material under a kind of low temperature hydrogen environment is provided, and this device is easy, economy, safety.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of device for measuring hydrogen embritllement sensitivity of materials in low-temperature environment that is used for, its feature by experiment table pedestal 2, experimental box 8, add mechanical axis 9, sample holder parts, fill hydrogen link and temperature survey and regulating device 18 and form; Wherein the sample holder parts are formed by loading anchor clamps A5, loading anchor clamps B6 and stationary fixture 4; Described experimental box 8 links to each other with experiment table pedestal 2; The sample holder parts are installed in the experimental box 8, are used for the clamping sample; Add mechanical axis 9 and pass experimental box 8 central authorities, add mechanical axis 9 bottoms, fill the hydrogen link and pass experimental box 8 central authorities from below, fill hydrogen link top and be connected by screw thread is coaxial with sample 12 bottoms by sample holder parts and coaxial connection of sample 12 tops from above; Temperature survey and regulating device 18 place in the experimental box 8.
Above-mentioned experiment table pedestal 2 is connected by bolt 1 with experimental box 8.
Above-mentioned experimental box 8 is made up of experimental box base plate 3, cavity 7, experimental box top cover 10 and heat-insulation layer 11.Wherein cavity 7 is connected with the external thread of experimental box base plate 3 with experimental box top cover 10 respectively by internal thread; Heat-insulation layer 11 is attached to cavity 7 outside surfaces.
Above-mentioned sample holder parts are formed by loading anchor clamps A5, loading anchor clamps B6 and stationary fixture 4, and an end that wherein loads anchor clamps A5 is connected by screw thread with an end that loads anchor clamps B6; Loading the anchor clamps B6 other end is connected with the external thread that adds mechanical axis 9 by internal thread; The other end that loads anchor clamps A5 is connected by the external thread of internal thread with sample 12 1 ends; One end of stationary fixture 4 is connected by the external thread of internal thread with the other end of sample 12; The other end of stationary fixture 4 is connected by the internal thread of external thread with experimental box base plate 3.
Above-mentioned temperature survey and regulating device 18 are made up of thermopair 13 and well heater 14; Wherein thermopair 13 is attached to the long intermediate surface of sample 12 marks position; Thermopair 13 is used for experiments of measuring the temperature inside the box, and well heater 14 is installed near the sample, is used for regulating experiment the temperature inside the box.Temperature survey is connected with external smart temperature controller system with regulating device 18, by the computer system collection.When experiment the temperature inside the box was lower than experiment institute and requires temperature, temperature control system in time feeds back to well heater so that the temperature accuracy when guaranteeing experiment.
The above-mentioned hydrogen link that fills is made up of encapsulant 15, securing member 16 and hydrogen input connecting pipe 17.Wherein hydrogen input connecting pipe 17 is connected with sample 12 internal threads by external thread; Securing member 16 is connected with stationary fixture 4 internal threads by external thread; Encapsulant 15 is filled between securing member 16 and sample 12 ends, and gas does not expose when filling hydrogen with assurance.
Above-mentioned experimental box top cover 10 perforates are so that the input cooling medium is used for making the required low temperature environment of experiment.
Above-mentioned experimental box base plate 3 perforates are so that temperature survey is connected with external unit with regulating device 18.
Above-mentioned experimental box base plate 3, cavity 7 and experimental box top cover 10 are in-250 ℃-5 ℃ low temperature environment.Its material is the resistance to low temperature material, is preferably 20Mn23Al steel, 15Mn17Al12CuV steel, 15Mn26Al4 steel, 03Cr13Ni5NMn19 or 07Cr21Mn7Ni5N.
Above-mentioned thermopair 13 is (K type thermopair) nickel chromium-nickel silicon thermocouple, (N type thermopair) nicrosil nisil thermocouple, (E type thermopair) nickel chromium triangle-CopperNickel thermocouple or (T type thermopair) copper-CopperNickel thermocouple.
The blind hole that an aperture is 0.2mm-2mm is made a call at above-mentioned sample 12 centers.Hole depth is from the long transition position of the mark of sample end to end, and blind hole one end is stepped, and machining internal thread is so that link to each other with hydrogen input connecting pipe 17.For the hole of 0.2mm-2mm, the gas flow of accumulation is about 0.002cm
3-0.2cm
3, fill the hydrogen amount for the sample under the 10MPa hydrogen and be about 1cm
3-100cm
3So it is quite safe for high pressure hydrogen.
This paper has developed that a kind of simple experiment method is used to measure the material mechanical performance under the High Pressure Hydrogen environment but the device that do not use high pressure chest.Neither need the equipment of extra raising pressure, reduced experimental expenses, solved the safety issue of experiment again.
Experimental provision installation process: as shown in Figure 1
1. experimental box base plate 3 is connected with experiment table pedestal 2 usefulness bolts 1.
2. the internal thread with manufactured sample 12 is connected with the external thread of hydrogen input connecting pipe 17.
3. stationary fixture 4 internal threads are connected with the external thread of sample 12.
4. the internal thread with stationary fixture 4 is connected with the external thread of securing member 16, middle filling airtight and watertight padding.
5. stationary fixture 4 external threads are connected with experimental box base plate 3 internal threads.
6. the external thread with sample 12 other ends is connected with the internal thread that loads anchor clamps A5
7. will be connected with the external thread of experimental box base plate 3 with the internal thread of the cavity 7 of heat-insulation layer 11.
8. internal thread one end that will load anchor clamps B6 is connected with the external thread that loads anchor clamps A5, the other end with add mechanical axis 9 and be threaded.
9. thermopair 13 is marked on the long intermediate surface attached to sample 12, well heater 14 is put near experimental box 8 samples 12, and thermopair 13 and well heater 14 are inserted external smart temperature controller systems, so that collecting temperature data and timely adjusting test temperature.
10. the external thread of experimental box top cover 10 is connected with the internal thread of cavity 7.
11. cooling medium is imported in the hole on the case top cover 10 by experiment.
12. with strainmeter this experimental provision next door of packing into, so that measure elongation after stretching.
13. outside computer data acquisition system, the monitoring experiment process constantly of connecting of this experimental provision.
14. ambient temperature is selected the different types of cooling according to concrete requirement difference of doing experiment.Test temperature is chosen 25K, 70K, 100K, 170K, six temperature spots of 190K, 298K respectively from low to high as the experimental temperature of tension test from 25K to 298K.Test temperature is measured by the thermopair in the middle of long attached to the specimen surface mark, by the intelligent temperature controller record.It is by the temperature control system control heater, temperature required when specimen temperature is lower than desired experimental temperature so that assurance is tested.Except that stretching transverse velocity when the 25K be the 36mm/h during other test temperature the stretching transverse velocity be 3.6mm/h (strain rate be 2.8*10
-5/ s).Hydrogen embrittlement susceptibility is weighed by reduction of area.Rupture surface is observed by scanning electron microscope SEM.
Beneficial effect:
Compared with prior art, the invention has the advantages that and developed the simple experiment device that a kind of mechanical property that is used to measure the material under the High Pressure Hydrogen environment changes that this device does not use high pressure chest.Do not need the equipment of extra raising pressure yet, both reduced experimental expenses, solved the safety issue of experiment again; And this equipment can not only be used to do stretching experiment, but also can do fatigue experiment and other uniaxial test; All gases or liquid environment all can charge into the sample aperture, to do the measurement of the material property under the varying environment.
Description of drawings
Fig. 1 is for being used for material hydrogen embrittlement susceptibility measurement mechanism figure under low temperature and the ultra-low temperature surroundings; Wherein 1-bolt, 2-experiment table pedestal, 3-experimental box base plate, 4-stationary fixture, 5-loading anchor clamps A, 6-loading anchor clamps B, 7-cavity, 8-experimental box, 9-add mechanical axis, 10-experimental box top cover, 11-heat-insulation layer, 12-sample, 13-thermopair, 14-well heater, 15-encapsulant, 16-securing member, the input of 17-hydrogen connecting pipe, 18-temperature survey and regulating device
Embodiment:
Embodiment 1
As shown in Figure 1, a kind ofly be used for material hydrogen embrittlement susceptibility measurement mechanism under low temperature and the ultra-low temperature surroundings, by experiment table pedestal 2, experimental box 8, add mechanical axis 9, sample holder parts, fill hydrogen link and temperature survey and regulating device 18 and form.
The experimental provision installation process:
1. experimental box base plate 3 is connected with experiment table pedestal 2 usefulness bolts 1.
2. the internal thread with manufactured sample 12 is connected with the external thread of hydrogen input connecting pipe 17.
3. stationary fixture 4 internal threads are connected with the external thread of sample 12.
4. the internal thread with stationary fixture 4 is connected with the external thread of securing member 16, middle filling airtight and watertight padding.
5. stationary fixture 4 external threads are connected with experimental box base plate 3 internal threads.
6. the external thread with sample 12 other ends is connected with the internal thread that loads anchor clamps A5
7. will be connected with the external thread of experimental box base plate 3 with the internal thread of the cavity 7 of heat-insulation layer 11.
8. internal thread one end that will load anchor clamps B6 is connected with the external thread that loads anchor clamps A5, the other end with add mechanical axis 9 and be threaded.
9. thermopair 13 is marked on the long intermediate surface attached to sample 12, well heater 14 is put near experimental box 8 samples 12, and thermopair 13 and well heater 14 are inserted external smart temperature controller systems, so that collecting temperature data and timely adjusting test temperature.
10. the external thread of experimental box top cover 10 is connected with the internal thread of cavity 7.
11. cooling medium is imported in the hole on the case top cover 10 by experiment.
12. with strainmeter this experimental provision next door of packing into, so that measure elongation after stretching.
13. outside computer data acquisition system, the monitoring experiment process constantly of connecting of this experimental provision.
14. ambient temperature is selected the different types of cooling according to concrete requirement difference of doing experiment.Test temperature is chosen 25K, 70K, 100K, 170K, six temperature spots of 190K, 298K respectively from low to high as the experimental temperature of tension test from 25K to 298K.Test temperature is measured by the thermopair in the middle of long attached to the specimen surface mark, by the intelligent temperature controller record.It is by the temperature control system control heater, temperature required when specimen temperature is lower than desired experimental temperature so that assurance is tested.Except that stretching transverse velocity when the 25K be the 36mm/h during other test temperature the stretching transverse velocity be 3.6mm/h (strain rate be 2.8*10
-5/ s).Hydrogen embrittlement susceptibility is weighed by reduction of area.Rupture surface is observed by scanning electron microscope SEM.
Experimentation:
A) sample:
Through heat bundle, the austenite 304 of solution treatment, 304L, 316L stainless steel round bar, being processed into the two ends diameter is 13mm, and mark strong point diameter is 6.25mm, and the dumbbell shape sample of length 16mm is used sand papering, and is stand-by.
At first feed the air in the small quantity of hydrogen drain sample aperture, high pressure hydrogen is charged in the aperture on the sample until being full of by gas cylinder then.Aperture on the sample is obtained by machine work, diameter 2mm, and therefore, the cumulative volume of aperture is about 0.2cm
3, when institute filled hydrogen and is 10Mpa, gas content was about 100cm in its sample
3Therefore quite safe for the high pressure hydrogen experiment.And this individual system do not need compressor, do not have extra testing expenses.Its test temperature of sample that is filled with gases at high pressure is controlled from low to high by ambient temperature, promptly from-248 ℃-5 ℃.The feature of this method is can not only do tension test can also do torture test and other uniaxial test and all gases or liquid environment and all can charge into the sample aperture.
B) temperature control:
Test temperature: 25K～298K (getting 25K, 70K, 100K, 170K, 190K, 298K):
25K-70K: by the helium cooling of evaporation on every side.Temperature is controlled by well heater.
77K: sample is in the liquid nitrogen.
100K-170K: sample is cooled off by nitrogen.
190K-298K: sample is cooled off by ethanol.
Ambient temperature is selected the different types of cooling according to concrete requirement difference of doing experiment.Test temperature is chosen 25K, 70K, 100K, 170K, six temperature spots of 190K, 298K respectively from low to high as the experimental temperature of tension test from 25K to 298K.Test temperature is measured by the thermopair in the middle of long attached to the specimen surface mark, by the intelligent temperature controller record.It is by the temperature control system control heater, temperature required when specimen temperature is lower than desired experimental temperature so that assurance is tested.Except that stretching transverse velocity when the 25K be the 36mm/h during other test temperature the stretching transverse velocity be 3.6mm/h (strain rate be 2.8*10
-5/ s).
Hydrogen embrittlement susceptibility is weighed by reduction of area.Rupture surface is observed by scanning electron microscope SEM.
Except that the foregoing description, the present invention can have many kinds of embodiments, allly replaces or similar combined transformation all drops within the protection domain that the present invention requires in the equivalence implemented on the basis of the present invention.
Claims (8)
1. one kind is used for material hydrogen embrittlement susceptibility measurement mechanism under the low temperature border, it is characterized in that by experiment table pedestal (2), experimental box (8), adds mechanical axis (9), sample holder parts, fills hydrogen link and temperature survey and regulating device (18) and form; Wherein the sample holder parts are formed by loading anchor clamps A (5), loading anchor clamps B (6) and stationary fixture (4); An end that loads anchor clamps A (5) is connected by screw thread with an end that loads anchor clamps B (6); Loading anchor clamps B (6) other end closely is connected with the external thread that adds mechanical axis (9) by internal thread; The other end that loads anchor clamps A (5) is connected by the external thread of internal thread with sample (12) one ends; One end of stationary fixture (4) closely is connected by the external thread of internal thread with the other end of sample (12); The other end of stationary fixture (4) is connected by the internal thread of external thread with experimental box base plate (3); Described experimental box (8) links to each other with experiment table pedestal (2); Experimental box (8) is made up of experimental box base plate (3), cavity (7), experimental box top cover (10) and heat-insulation layer (11); Wherein cavity (7) is connected with the external thread of experimental box base plate (3) with experimental box top cover (10) respectively by internal thread; Heat-insulation layer (11) is attached to cavity (7) outside surface; The sample holder parts are installed in the experimental box (8); Add mechanical axis (9) and pass experimental box (8) central authorities from above, add mechanical axis (9) bottom by sample holder parts and sample (12) the coaxial connection of top, fill the hydrogen link and pass experimental box (8) central authorities from below, fill hydrogen link top and be connected by screw thread is coaxial with sample (12) bottom; Temperature survey and regulating device (18) place in the experimental box (8).
2. as claim 1 shown device, it is characterized in that experiment table pedestal (2) is connected by bolt (1) with experimental box (8).
3. as claim 1 shown device, it is characterized in that experimental box top cover (10) perforate, the input cooling medium; Experimental box base plate (3) perforate is so that temperature survey is connected with external unit with regulating device (18).
4. as claim 1 shown device, it is characterized in that experimental box base plate (3), cavity (7), experimental box top cover (10), be in-250 ℃-5 ℃ low temperature environment; Its material is 20Mn23Al steel, 15Mn17Al12CuV steel, 15Mn26Al4 steel, 03Cr13Ni5NMn19 or 07Cr21Mn7Ni5N.
5. as claim 1 shown device, it is characterized in that temperature survey and regulating device (18) be made up of thermopair (13) and well heater (14); Wherein thermopair (13) is attached to the long intermediate surface of sample (12) mark position, and described mark is long for being used to measure the column part of elongation in the middle of the dumbbell shape sample; Well heater (14) is installed near the sample; Temperature survey is connected with external smart temperature controller system with regulating device (18).
6. as claim 5 shown device, it is characterized in that thermopair (13) is nickel chromium-nickel silicon thermocouple, nicrosil nisil thermocouple, nickel chromium triangle-CopperNickel thermocouple or copper-CopperNickel thermocouple.
7. as claim 1 shown device, it is characterized in that filling the hydrogen link and form by encapsulant (15), securing member (16) and hydrogen input connecting pipe (17); Wherein hydrogen input connecting pipe (17) is connected with sample (12) internal thread by external thread; Securing member (16) is connected with stationary fixture (4) internal thread by external thread; Encapsulant (15) is filled between securing member (16) and sample (12) end.
8. as claim 7 shown device, it is characterized in that sample (12) center makes a call to the blind hole that an aperture is 0.2-2mm, hole depth is from the long transition position of the mark of sample end to end, and the long transition position of described mark is the bare terminal end of dumbbell shape sample and the arc transition coupling part between the mark length; Blind hole one end is stepped, and machining internal thread is so that be connected with hydrogen input connecting pipe (17).
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| CN2009102342712A CN101706395B (en) | 2009-11-18 | 2009-11-18 | Device for measuring hydrogen brittleness sensitivity of material in low-temperature environment |
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|---|---|---|---|
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